The PZ4TX+ furthers BlueSeventy's drive to maximize performance in non-wetsuit swims. Over a year of extensive testing with professional and amateur athletes has produced a short sleeve version of their industry-leading PZ4 that meets the demands of the sport's elite. They hand-selected the Italian fabrics featured in this suit from renowned textile manufacturer Taiana. Developed for BlueSeventy's competition pool suits, with hydrophobic qualities built into the yarns. These fabrics are infused to repel water instead of after-market coatings that can lose their water repellency over time. The development of the short sleeves was conducted over countless hours of testing with and without a tri suit underneath to ensure an excellent fit, flexibility and improved hydrodynamics in the water.